Beveling and sealing clamp



April 12, 1927. 1,624,616

" T. MIDGLEY BEVELING AND SEALING CLAMP I Filed July 24, 1925 I III/II I'll" INVEN TOR.

uxm ORNEY.

vPatented Apr. 12, 1927.

i STE-TBS A i i 11,624,616

. THQMAs QGL Y, M} s. eH1IsErs realism m nganese V A QQ.B. B '1Il9 \T QE..MA ACH to be applied;

i fully applied.

place as by welding at 12, or by some other srrrs;

BEvELi -e Ann snnrme onamr.

Application:jfiledzfifuly. 24', 1925. Serial No. 15,900.

mandrel with the skiving sleeve permanently,

afiixed to it; Fig. 2 is a section showing the clamp about Fig. -3 is a similar section showing the 'clampjin place; and p I Fig. 4: is an end View showing the clamp In the present canizing mandrel 10 carries at each enda skiving sleeve 11 permanently secured 1n method. In any-case, however, the sleeve preferaby makes an airtight joint with the mandrel to avoid the entrance of steam underneath the rubber. These sleeves each havea portion 13 tapered to give the angle of skive desired on the tube, and a jflat por tion 14 which gives a stabilizing support to the other parts of the clamp. The tapered: and flat portions preferably'do not merge directly into each other, but are separated'by a shoulder 15 which prevents the formation 7 of a feather edge on the tube. The movable part of the clamp comprises split halves16, threaded on a taper and as a unit upon their outer peripheries to .receive an internally threaded ring 17. When the ring is screwed in place the two halves; which separate along lines 18' as shownin Fig. 4, are held together to form a functionally integral unit having a smooth cylindrical bore'l9. o 7 In use the unvulcanized tube a is placed upon the mandrel with'its ends" 20 extending over the'fixed' skiving sleeves 11' as in Fig.

" drel at a point between the" two skiving sleeves, also as shown inthe case of one of them in Fig.2. Flnall by exerting a considerable forcein the d rection of the arrow 2. The movable part of each of the two end clamps is assembled about the tube and manform of clamp the tube vul movable part :01? each clamp is drawn onto its skiving sleeve'as in Fig. 3, pushing the excess rubber, which is in its uncured soft state,'ahead ofit.' By thisv operation the end of the tube is atonce skivedand trimmed accurately to length, the distance'between the shoulders 15 on the two'clampsremaining the same and determining the length of the V 7 tube irrespective of any variation inplacing the movable part ofthe clamps. The surplus rubber 22 at the ends of the tube has thus beensh'eared off, and can now be removed by simply pullingit. This, a feature 'present in common with the clamp shown in my co'pending application3Serial No.. v45,899, filed July 241, 1925, is of importance since scrap rubber is-much more valuable uncured thancured. In disassembling the clamp it..

when the whole movable partof the clamp can be pulled oif the end'of'the'tube.

While the clamp as described is the 'preferred embodiment ofthe modification of my invention to which the present case relates,'; the details of COIiStlLlCtlQHlDfiY be varied as desired by the user or as dictated by circum 'stances, within the scope of theinventionas set forth in the accompanying claims.

- For eXample, certa1n' of the advantages of J this inventionwill beretained in some cases by replacing the clamp 16.17 witha spiral is convenient to unscrew thering 18 enough V to separate the halves 16 from the "rubber,

wrapping of tape such as haspreviously been used for sealing ,the'end: of the tubeto the mandrel. By this modified method the-tube wi'llbe cut to length by ,some'other means, the sleeve '11, however, furnishing a gauge for this:purpose.

sleeve 11.

l Theskiving of the tube w ll be accompllshed-by the action of the tape against the skiv'ed part 13 of the Having thus described my invention, I

claim: r

1. In combination, a tube vulcanizing mandrel havlng a tapered sklving portion p-ermanently'located thereon, anda member having ;a substantially. cylindrical bore adapted to be drawn over the skivingportion of the mandrel to press the tube tightly against it.

.2}? In combination, a tube vulcanizing mandrel having a tapered 'skiving portion terminating in a cylindrical 'surface'j of 'largerifdiameter than the diameter of the body of the mandrel, and a member having a cylindrical bore of substantially the same diameter as said cylindrical surface and adapted to be drawn over the skiving portion of the mandrel to press the tube tightly against it and toshear off the tube to length.

'3. In combination, a tube vulcanizing mandrelhaving a tapered skiving portion terminating in a circumference larger than that of the body of the mandrel, and a member having a cylindrical bore of substantially the same diameter as said circumference and adapted to be drawn over the skiv ing" portion of the mandrel to press the tube tightly against it and'to shear the tube to length. 7 y

4. In combination, a tube vulcanizing mandrel, a tapered skiving sleeve located in a fluid tight manner thereon, and a member having a substantially cylindrical bore adapted to be drawn over said sleeve'to skirt! and seal the tube.

I THOMAS MIDGLEY. 

